diff --git a/.github/workflows/icu4c.yml b/.github/workflows/icu4c.yml
new file mode 100644
index 00000000..64024c6a
--- /dev/null
+++ b/.github/workflows/icu4c.yml
@@ -0,0 +1,29 @@
+name: Build ICU4C Demos
+
+on:
+  push:
+    branches:
+    - '*'
+  pull_request:
+    branches:
+    - '*'
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v2
+    # ccache?
+    - name: Cache apk
+      uses: actions/cache@v2
+      with:
+        path: ~/.apk
+        key: apk
+        restore-keys: |
+          apk
+    - name: Build iucsamples4c with docker
+      run: >
+        cd iucsamples/c && docker run --rm -v $HOME/.apk:/etc/apk/cache -v $(pwd)/:/usr/src -w /usr/src alpine:edge sh -c "apk --update add gcc make g++ bsd-compat-headers pkgconfig icu-dev && make all check"
+    - name: Build icudemos with docker
+      run: >
+        cd icu-kube && sh build.sh
+    # TODO: non-docker build?
diff --git a/.github/workflows/icu4j.yml b/.github/workflows/icu4j.yml
new file mode 100644
index 00000000..e113b3a5
--- /dev/null
+++ b/.github/workflows/icu4j.yml
@@ -0,0 +1,36 @@
+name: Build ICU4J Demos
+
+on:
+  push:
+    branches:
+    - '*'
+  pull_request:
+    branches:
+    - '*'
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v2
+    - name: Set up JDK 11
+      uses: actions/setup-java@v1
+      with:
+        java-version: 11
+    - name: Cache local Maven repository
+      uses: actions/cache@v2
+      with:
+        path: ~/.m2/repository
+        key: ${{ runner.os }}-maven-${{ hashFiles('**/pom.xml') }}
+        restore-keys: |
+          ${{ runner.os }}-maven-
+    - name: Build with Maven
+      run: >
+        mvn --file icu4jweb/pom.xml -s .github/workflows/mvn-settings.xml -B package
+      env:
+        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+    - name: Build container unicode/icu4jweb
+      run: >
+        cd icu4jweb ; bash build-docker.sh
+    - name: Build iucsamples4j
+      run: >
+        mvn --file iucsamples/j/icu2work/pom.xml -s .github/workflows/mvn-settings.xml -B test
diff --git a/.github/workflows/mvn-settings.xml b/.github/workflows/mvn-settings.xml
new file mode 100644
index 00000000..f3b33185
--- /dev/null
+++ b/.github/workflows/mvn-settings.xml
@@ -0,0 +1,58 @@
+<!--
+Copyright © 1991 and later Unicode, Inc.
+All rights reserved.
+License and terms of use: http://www.unicode.org/copyright.html
+
+This file is used during builds to be able to access a temporary copy
+of icu4j.jar and utilities.jar. See CLDR-11585.
+TODO: Remove this when ICU-21251 is completed.
+-->
+<settings xmlns="http://maven.apache.org/SETTINGS/1.0.0"
+  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+  xsi:schemaLocation="http://maven.apache.org/SETTINGS/1.0.0
+                      http://maven.apache.org/xsd/settings-1.0.0.xsd">
+  <activeProfiles>
+    <activeProfile>github</activeProfile>
+  </activeProfiles>
+  <profiles>
+    <profile>
+      <id>github</id>
+      <repositories>
+        <!-- the 'central' repository is already defined by default. -->
+        <repository>
+          <id>github</id>
+          <name>GitHub unicode-org/cldr Apache Maven Packages</name>
+          <url>https://maven.pkg.github.com/unicode-org/cldr</url>
+        </repository>
+        <repository>
+          <id>githubicu</id>
+          <name>GitHub unicode-org/icu Apache Maven Packages</name>
+          <url>https://maven.pkg.github.com/unicode-org/icu</url>
+        </repository>
+        <repository>
+          <id>githubcldr</id>
+          <name>GitHub unicode-org/cldr Apache Maven Packages</name>
+          <url>https://maven.pkg.github.com/unicode-org/cldr</url>
+        </repository>
+      </repositories>
+    </profile>
+  </profiles>
+
+  <servers>
+    <server>
+      <id>github</id>
+      <username>${GITHUB_ACTOR}</username>
+      <password>${GITHUB_TOKEN}</password>
+    </server>
+    <server>
+      <id>githubicu</id>
+      <username>${GITHUB_ACTOR}</username>
+      <password>${GITHUB_TOKEN}</password>
+    </server>
+    <server>
+      <id>githubcldr</id>
+      <username>${GITHUB_ACTOR}</username>
+      <password>${GITHUB_TOKEN}</password>
+    </server>
+  </servers>
+</settings>
diff --git a/.github/workflows/upload-on-tag.yml b/.github/workflows/upload-on-tag.yml
new file mode 100644
index 00000000..44d0aefa
--- /dev/null
+++ b/.github/workflows/upload-on-tag.yml
@@ -0,0 +1,50 @@
+name: Push to GCR Github Action
+on:
+  push:
+    tags:
+    - '*'
+jobs:
+  build-and-push-to-gcr:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v2
+    - name: Set up JDK 11
+      uses: actions/setup-java@v1
+      with:
+        java-version: 11
+    - name: Cache local Maven repository
+      uses: actions/cache@v2
+      with:
+        path: ~/.m2/repository
+        key: ${{ runner.os }}-maven-${{ hashFiles('**/pom.xml') }}
+        restore-keys: |
+          ${{ runner.os }}-maven-
+    - name: Build icu4jweb with Maven
+      run: >
+        mvn --file icu4jweb/pom.xml -s .github/workflows/mvn-settings.xml -B package
+      env:
+        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+    - name: Get the tag name
+      id: get_tag_name
+      run: echo ::set-output name=GIT_TAG_NAME::${GITHUB_REF/refs\/tags\//}
+    - name: Build and Upload ICU4C-Demos Container
+      uses: RafikFarhad/push-to-gcr-github-action@v3
+      with:
+        gcloud_service_key: ${{ secrets.GCLOUD_SERVICE_KEY }}
+        registry: us.gcr.io
+        project_id: icu4c-demos
+        image_name: icu4c-demos
+        image_tag: ${{ steps.get_tag_name.outputs.GIT_TAG_NAME}}
+        dockerfile: icu-kube/docker.d/icu4c-demos/Dockerfile
+        context: .
+        build_args: ICU_PATH=system
+    - name: Build and Upload ICU4J-Demos Container
+      uses: RafikFarhad/push-to-gcr-github-action@v3
+      with:
+        gcloud_service_key: ${{ secrets.GCLOUD_SERVICE_KEY }}
+        registry: us.gcr.io
+        project_id: icu4c-demos
+        image_name: icu4j-demos
+        image_tag: ${{ steps.get_tag_name.outputs.GIT_TAG_NAME}}
+        dockerfile: icu4jweb/Dockerfile
+        context: icu4jweb